Free - Twin Disc MG-506 Troubleshooting Guide Twin Disc MG 506 Marine Transmission Parts - Individual Seals Section Loading... 1 Front seal for Twin Disc marine gear MG506 Input shaft seal Price: $ 15.65 Qty: ^ Pictures In Stock Add to Cart 2 Rear seal for Twin Disc marine gear MG506 Output shaft seal Price: $ 35.77 Qty: ^ Details In Stock Add to Cart 3 Rear seal for Twin Disc marine gear MG506 Reduction Ratios 1.50:1 and 1.97:1 Price: $ 59.45 Qty: ^ Details In Stock Add to Cart 4 Mechanical & Electric Gauges See Our Gauges Page 5 Controls Cables & More... See All Control, Cables & More 6 Marine Water Pumps See All Marine Water Pumps 7 Fresh Water Pumps See All Fresh Water Pumps Free - Twin Disc MG-506 Troubleshooting Guide